YOU SAID:

i don't understand what this is all about

INTO JAPANESE

私はこれが何であるかを理解していません

BACK INTO ENGLISH

i don't understand what this is

INTO JAPANESE

これが何なのかわかりません

BACK INTO ENGLISH

i don't know what this is

INTO JAPANESE

これが何なのかわからない

BACK INTO ENGLISH

i don't know what this is